I made this for myself yesterday and probably have enough to last me a week.
Pretty simple to make. You can mash the potatoes as you would mashed potatoes. If they're soft enough, this will save you the annoying task of cleaning a blender or food processor.
If I make it again, I'll use less peanut butter (it's a little sweet) and more chiles.
WARNING: This soup is very filling. Don't fill an entire bowl expecting to eat it all.